XL Group plc To Announce Third Quarter 2012 Results on Monday, November 5, 2012

Dublin, IrelandThu Oct 4, 2012 —

XL Group plc (“XL” or the “Company”) (NYSE: XL) announced today that it intends to release its Third Quarter 2012 results after the close of regular stock market trading hours on Monday, November 5, 2012.A conference call to discuss the Company’s results will be held at 5 p.m. Eastern Time on Monday, November 5, 2012.

The conference call can be accessed through a listen-only dial-in number or through a live webcast.To listen to the conference call, please dial (210) 795-0624 or (866) 617-1526: Passcode: “XL GLOBAL”.The webcast will be available at www.xlgroup.com and will be archived on XL’s website from approximately 9:00 p.m. Eastern Time on November 5, 2012, through midnight Eastern Time on December 5, 2012.A telephone replay of the conference call will also be available beginning at approximately 9:00 p.m. Eastern Time on November 5, 2012, until midnight Eastern Time on December 5, 2012, by dialing (203) 369-1231 or (866) 454-1408.

About XL Group plc

XL Group plc, through its subsidiaries, is a global insurance and reinsurance company providing property, casualty and specialty products to industrial, commercial and professional firms, insurance companies and other enterprises throughout the world.

XL is the company clients look to for answers to their most complex risks and to help move their world forward. Its principal offices are located at No.1 Hatch Street Upper, 4th Floor, Dublin 2, Ireland. To learn more, visit www.xlgroup.com